const arr = [{
    name: "Quincy",
    role: "Founder",
    isBot: false
}, {
    name: "Naomi",
    role: "",
    isBot: false
}, {
    name: "Camperbot",
    role: "Bot",
    isBot: true
}];




function truthCheck(collection, pre) {
  return collection.every(obj => obj[pre]);
}

console.log(truthCheck(arr));